1. A
Sea of Health and Environmental Hazards in Houston’s Floodwaters
The New York Times AUG. 31, 2017
Navigating
floodwaters brought by Harvey on Tuesday in Houston. CreditDavid J.
Phillip/Associated Press
Officials
in Houston are just beginning to grapple with the health and environmental
risks that lurk in the waters dumped by Hurricane Harvey, a stew of toxic
chemicals, sewage, debris and waste that still floods much of the city.
Flooded
sewers are stoking fears of cholera, typhoid and other infectious diseases.
Runoff from the city’s sprawling petroleum and chemicals complex contains any
number
of hazardous compounds. Lead, arsenic and other toxic and carcinogenic elements
may be leaching from some two dozen Superfund sites in the Houston area.
Porfirio
Villarreal, a spokesman for the Houston Health Department, said the hazards of the water
enveloping the city were self-evident.
“There’s
no need to test it,” he said. “It’s contaminated. There’s millions of
contaminants.”
He
said health officials were urging people to stay out of the water if they
could, although it is already too late for tens of thousands.
“We’re
telling people to avoid the floodwater as much as possible. Don’t let your
children play in it. And if you do touch it, wash it off,” Mr. Villarreal said.
“Remember, this is going to go on for weeks.”
Flooding
always brings the danger of contamination and disease, though epidemics from
floods in the United States have been rare. This inundation, which put nearly
30 percent of the nation’s fourth-largest city underwater, will pose enormous
problems, both immediately and when the waters finally recede.
Dr. David Persse, Houston’s director of
Emergency Medical Services, said officials were monitoring the drinking water
system and the sewer system, both of which he said were intact so far. But
hundreds of thousands of people across the 38 Texas counties affected by
Hurricane Harvey use private wells, according to an estimate by Louisiana State
University researchers, and those people must fend for themselves.
“Well
water is at risk for being contaminated,” Dr. Persse said, “and the well owner
is really the one who is responsible. In the City of Houston, we have folks
that use well water but we strongly recommend against it — and this will sound
awful — we don’t take responsibility for it.”
Harris
County, home to Houston, hosts more than two dozen current and former toxic
waste sites designated under the federal Superfund program. The sites contain what the Environmental Protection
Agency calls legacy contamination: lead, arsenic, polychlorinated biphenyls,
benzene and other toxic and carcinogenic compounds from industrial activities
many years ago.
Kathy
Blueford-Daniels grew up just a block away from one of those sites, a
wood-treating facility that used cancer-causing creosote and other toxins. As a
young girl, she would try to avoid the plant and the pungent, oil-like goo that
lined the ditches around it.
Now
60, Ms. Blueford-Daniels still lives on the same block, in Houston’s Fifth
Ward. So when Harvey’s rains started to pour into her neighborhood, she
immediately began to wonder what the rising waters would carry off the old
industrial property.
“I
wasn’t so fearful of the storm. But I’m scared of that site,” she said. “I
thought: This is going to be a travesty. The contamination could be going
anywhere.”
An
E.P.A. spokesman, David Gray, said in a statement that the agency would inspect
two flooded Superfund sites in Corpus Christi, but
he did not specify which ones or say whether additional sites elsewhere in
Texas would be checked.
Houston
also lies at the center of the nation’s oil and chemical industry, its bustling shipping
channel home to almost 500 industrial sites. Damaged refineries and other oil
facilities have already released more than two million pounds of hazardous
substances into the air this week, including nitrogen oxide as well as benzene
and other volatile organic compounds, according to a tally by the Environmental
Defense Fund of company filings to Texas state environmental regulators.
2. Trump and Abe vow to increase pressure after North Korea
fires missile over Japan
Leaders
agreed to call for an emergency meeting of the UN security council to discuss
the launch
The Guardian in Tokyo 29 August 2017
Donald
Trump and Shinzo Abe have vowed to increase pressure on North Korea after the
regime launched a missile over Japan on Tuesday morning.
The
Japanese prime minister denounced the launch as an “unprecedented and grave
threat” to the country’s security. In a 40-minute phone call with the US
president they agreed to call for an emergency meeting of the UN security
council to discuss the situation.
Officials
in South Korea said the missile may have flown further than any other tested by
North Korea. The test, one of the most provocative ever from the reclusive
state, sent a clear message to Washington just weeks after Kim Jong-un threatened to target the US Pacific
territory of Guam with similar intermediate-range missiles.
It
also demonstrated the regime’s willingness to raise the diplomatic stakes by
sending a missile directly over Japanese territory. Pyongyang has tested more
powerful intercontinental ballistic missiles (ICBM) this year, but Tuesday’s
launch followed a much flatter trajectory than those tests.
Trump
said the US was “100% with Japan” and repeated his strong commitment to the
defence of Japan, Abe said shortly after the call.
“The
outrageous act of firing a missile over our country is an unprecedented,
serious and grave threat and greatly damages regional peace and security,” Abe
told reporters in Tokyo, adding that his government had protested to Pyongyang
via the Japanese embassy in Beijing.
The
missile was the third fired by North Korea to have passed over Japanese
territory. The first was in 1998 and the second in 2009, although Pyongyang
claims they were satellites.
Abe
said Japan would “strongly call for increased pressure on North Korea in
cooperation with the international community” via the security council.
The
missile, thought to be a new intermediate-range Hwasong-12, flew over Hokkaido
and landed in the Pacific about 733 miles (1,180km) east of the northern
Japanese island, South Korean and Japanese officials said.
The
Hwasong-12 is the same type of missile North Korea recently threatened to
launch towards Guam.
China
called for restraint and warned that the situation on the Korean peninsular had
reached “a tipping point approaching a crisis”.
Foreign
ministry spokeswoman Hua Chunying told a daily press briefing in Beijing:
“Think hard about it, who do you think should take the blame, if China is
urging all parties to calm down while one party holds constant military
exercises … and the other is constantly launching missiles?”
Japan’s
J-Alert warning system advised people across a large area of northern Japan to
seek shelter. Japan’s self-defence forces did not attempt to shoot down the
missile and there were no reports of damage from falling debris.
The
public broadcaster NHK said the missile had been launched from a site near the
North Korean capital, Pyongyang and passed over a sparsely populated area of
Hokkaido just after 6am local time (10pm Monday British summer time). It broke
into three parts and landed in the sea.
Seoul’s
joint chiefs of staff (JCS) said the missile travelled about 2,700km and
reached a maximum height of 550km.
The
JCS said it was analysing the launch with the US and that South Korea’s
military had strengthened its monitoring and preparation in case of further
actions from North Korea.
Abe
said his government was trying to establish the details of the launch and was
doing everything possible to ensure the safety of the Japanese people.
Tuesday’s
launch may have been a show of defiance towards military drills involving US and
South Korean troops as well as a smaller number of personnel from other
countries.
The
drills have coincided with a dramatic rise in tensions on the Korean peninsula
after North Korea’s test launch of two ICBMs and its threat to target seas off
the coast of the Guam.
Seoul
and Washington say their drills are an opportunity for the allies to improve
their defensive capabilities but Pyongyang routinely denounces them as a dress
rehearsal for war against North Korea.
3. Does Cooking Boost Nutrients in Tomatoes and Spinach?
The New York Times SEPT.
1, 2017
CreditTony
Cenicola/The New York Times
Q. Is it true tomatoes and spinach release more of their nutrients when
they’ve been cooked?
A. It’s
true for some nutrients, but not for others.
Water-soluble vitamins like vitamin C and the B vitamins,
which include folate, leach out of vegetables
if you boil them, but some will be retained in the stock, so “use it if you’re
making soup,” said Helen Rasmussen, a senior research dietitian at the Jean
Mayer USDA Human Nutrition Research Center on Aging at Tufts University.
Vitamin levels are reduced the longer you expose them to heat; “they’re just
not stable,” she said.
Levels
of other nutrients, however, may increase. One study found that while cooking
decreased the amount of vitamin C in tomatoes, the cooking process increased
levels of antioxidants that could be absorbed by the body, including levels of
lycopene, the carotenoid plant pigment that helps protect the body from free
radical damage. “You might be able to get more lycopene out because the heat starts
to break down the cell matrix and that actually allows some of the
tied-up carotenoids to be released from
the cell walls,” Dr. Rasmussen said.
Raw
spinach provides a lot of fiber, but cooked spinach may provide more beta carotene: One study found that three times as
much beta carotene — an antioxidant that’s a form of vitamin A — was absorbed
from cooked spinach compared with raw spinach.
“There are pluses and minuses with both ways
of preparing food,” Dr. Rasmussen said. Since spinach loses so much volume when
it’s cooked, a cup of cooked spinach contains a lot more of the leafy vegetable,
which may more than make up for the loss of water-soluble vitamins.
Generally
speaking, boiling has the harshest effect on heat-sensitive nutrients.
Stir-frying or sautéing retains more nutrients than boiling, but if you want to
retain the nutrients, steaming and microwaving vegetables may be the optimal
cooking methods.
沒有留言:
張貼留言