A new study shows that rising levels of planet-warming gases may reduce important nutrients（营养物质）in food crops

Researchers studied the effects of carbon dioxide on rice， In the experiment， scientists grew 18 kinds of rice in fields in China and Japan．They set carbon dioxide levels to what scientists are predicting for our planet by the end of the century．Rice grown under high carbon dioxide conditions had，on average，13 to 30 percent lower levels of four B vitamins and 10 percent less protein（蛋白质）The crops also had 8 percent less iron and 5 percent less zinc than rice grown under normal conditions However， vitamin E leveLs increased by about 13 percent on average．

The researchers said the effects of planet-warming gases would be most sevcre for the poorest citizens in some of the least developed countries．These people generally eat the most rice and have the least complex diets．That includes abour 600 million people in Indonesia， Cambodia，Myanmar，Bangladesh，Laos and other nations，mainly in Southeast Asia．

Other studies have shown that higher temperatures from climate change and weather extremes will reduce food production．But scientists are finding that rising levcls of carbon dioxide and other planet-warming gases threaten food quality．

Earlier studies showed that wheat，rice，field peas and soybeans grown under high carbon dioxide conditions all had Iower levels of protein and mincrais．Scientists predicted that almost 150 million people might be at risk of having too little protein or zinc in their diet by 2050．

The new study suggests a way to lower the nutritional harm of climate change．That is to grow different forms of rice that can adapt to higher carbon dioxide levels．

Rising global meat consumption is likely to have a destructive environmental effect, increasing carbon emissions(排放)and reducing biodiversitiy (生物多样性), scientists have warned.

A new analysis suggests that meat consumption is set to climb sharply as the world population increases along with average individual incomes.

“What's happening is a big concern.” said Tim Key from the University of Oxford. “On a broad level you can say it is bad for the environment.”

The review,published in the journal Science, found that high levels of meat consumption also have negative health consequences, leading to an increased risk of cancer and other diseases.

The average amount of meat consumed per person globally has nearly doubled in the past 50 years, which means total meat production has been growing much faster than the rate of population growth, having increased four-or five-fold(五倍)since 1961.

There are recent indications that some countries,including the U.K.,may have reached "peak meat". The U.K's 2017 National Food Survey found meat consumption have fallen by 4.2% and that of meat products by nearly 7% since 2012. However, middle-income countries, particularly China and others in East Asia, are still seeing a rise. A recent review by the UN outlines how meat production-particularly livestock(家畜)-is linked to far higher carbon emissions than vegetables, fruit and grain.

Livestock farming is also a major contribution to biodiversity loss, as forests and wild land are given over to agricultural land to grow animal feed.

Processed meat has been ranked by the WHO alongside alcohol and tobacco as cancer causes. According to research of cancer, if no one ate processed or red meat in Britain, there would be 8,800 fewer cases of cancer a year.

For most people, nothing is better than having an iced beer after you are back home in hot summer. 【小题1】 Why? Just for the sake of your own health and the happiness of your family. Now good news for you. From now on you needn’t feel guilty just because you love beer. On the contrary, the benefits of drinking beer are obvious. But there is still one IMPORTANT point I have to make clear. 【小题2】

1. Beer reduces risk of heart disease You can easily reduce the risk of heart disease by 30% or more if you are one of the individuals who drink a pint of beer per day. The result is totally opposite if you drink too much beer. Be careful with your portions.

2. 【小题3】

Beer prevents diabetes due to the alcohol content which increases insulin (胰岛素) sensitivity. Also, beer is rich in dissolvable fiber that is so needed if the individual suffers from diabetes.

Beer minimizes risk of cancer Xanthohumol (抗氧化剂黄腐酚) is found in beer, which is very important since it has anti-cancer properties. Drinking beer in moderation speeds up chemical reactions that keep off the risk of prostate cancer (前列腺癌) in males. 【小题4】 Strange? But it is true. That is because the drink contains components that decrease the risk of breast cancer.

4. Beer manages blood pressure

According to the recent studies carried out by Harvard researchers, middle-aged women who drink beer in moderation were much less likely to develop high blood pressure. Other alcoholic drinks do not have the same properties.

5. Beer treats dandruff (头皮屑)

【小题5】 The high content of vitamin B and yeast (酵母菌) will make your hair smooth and silky. Go and have a try.

You’ll be surprised to find the annoying dandruff finally gone.