查看原文
其他

【106】科技: 巴西的热带雨林有危险吗?

littleflute 漂泊者乐园 2021-10-06



漂泊者乐园微信公众号在线英语学习资料

美国之音特别英语节目:慢速英语听力







*【106】科技:

SCIENCE & TECHNOLOGY

Are Brazil’s Rainforests in Danger?

November 28, 2018

This May 8, 2018 photo released by the Brazilian Environmental and Renewable Natural Resources Institute (Ibama) shows an illegally deforested area on Pirititi indigenous lands as Ibama agents inspect Roraima state in Brazil's Amazon basin. (Felipe Werneck/Ibama via AP)

The United Nations Climate Summit takes place next week in Poland. About 20,000 people from 190 countries are expected to take part in the conference.

There, world leaders will debate how to limit climate change -- the weather events linked to slowly rising temperatures on Earth. They will discuss ways to reduce carbon emissions and other pollution which, scientists say, can cause long-term changes to our planet.

For environmentalists, one area of concern is South America’s Amazon rainforest. Studies have shown that the Amazon takes in as much as 2 billion tons of carbon dioxide a year and releases 20 percent of Earth’s oxygen.

About 60 percent of the rainforest is in Brazil. Scientists wonder it will be protected under Brazil’s next president, Jair Bolsonaro. He takes office on January 1.

Bolsonaro has said that his country should withdraw from the 2015 Paris Agreement. Under the agreement, most nations promised to reduce carbon emissions 37 percent over 2005 levels by the year 2030.

The president-elect claims a mandate from voters to develop land for agriculture and other purposes. He said that Brazil’s rainforest protections are standing in the way of economic success.

Scientists say deforestation is a major reason for climate change. Studies have linked rising temperatures to the destruction of forests. Scientists worry about the future of the Amazon. New Brazilian government records show the speed of deforestation has increased over the past year.

Carlos Nobre is a climate scientist at the University of Sao Paulo. He told the Associated Press that it is almost impossible to say just how important the rainforest is to the planet’s living systems.

Some scientists call the Amazon “the lungs of the planet.” They liken it to human lungs. Each tree takes in and stores carbon dioxide from the air around it. The trees also release the oxygen we need to live.



In this March 10, 2018 photo released by Ibama, the Brazilian Environmental and Renewable Natural Resources Institute, agents from Ibama measure illegally cut timber from Cachoeira Seca indigenous land in Para state in Brazil's Amazon basin.


The Amazon, the world’s largest rainforest, also creates weather. Billions of trees pull up water through their roots. Then the trees release water vapor into the air. The vapor forms a thick mist, made up of tiny drops of water. These water particles move up into the clouds and later return to Earth as rainfall.

Scientists estimate that the Amazon creates 30 to 50 percent of its own rainfall.

During the election campaign, Bolsonaro promised to ease protections for areas of the Brazilian Amazon set aside for native peoples and wildlife. He said that indigenous lands and nature reserves restrict economic growth. “All these reserves cause problems to development,” he said.

The president-elect also talked about taking away the power of Brazil’s environmental ministry to enforce laws for protecting the environment.

Paulo Artaxo is a professor of environmental physics at the University of Sao Paulo. He said that if Bolsonaro keeps his campaign promises, then “deforestation of the Amazon will probably increase quickly — and the effects will be felt everywhere on the planet.”

Artaxo spoke to the Associated Press (AP).

Bolsonaro’s team did not answer a request from the AP for comment.

Some of Bolsonaro’s support comes from business and farming groups.

One supporter, senator-elect Luiz Carlos Heinze, noted that farmers “are not invaders, they are producers.” He blamed the past administrations for supporting native rights at the expense of farmers.

“Brazil,” he said,” will be the biggest farming nation on Earth during Bolsonaro’s years."

Scientists warn that if the Amazon and other tropical rainforests lose too many trees, this could affect rainfall in other areas. Nobre and others estimate that the “tipping” point for the Amazon system is 20 to 25 percent deforestation.

Without enough trees to support the rainfall, the longer and bigger dry season could turn more than half of the rainforest into a tropical grassland. That finding was published in February in the journal Science Advances.

I’m Anne Ball.


The Associated Press reported this story. Anne Ball adapted the report for VOA Learning English. George Grow was the editor.

We want to hear from you. Write to us in the Comments Section.

_____________________________________________________________

Words in This Story

emissions - n. the act of producing or sending out something (such as energy or gas) from a source

mandate - v. an official order to do something

vapor - n. a substance that is in the form of a gas or that consists of very small drops or particles mixed with the air

indigenous - adj. produced, living, or existing naturally in a particular region or environment

tropical - adj. of, relating to, occurring in, or used in the tropics

tipping - adj.


您好!既然漂到这里,就顺便把本文转到朋友圈吧!


提示: 在本公众号后台,回复  d5可收听查看所有《科学技术 SCIENCE & TECHNOLOGY 》文章。



你肯定没有打伤我的内功,但一定有打赏我的冲动!


: . Video Mini Program Like ,轻点两下取消赞 Wow ,轻点两下取消在看

您可能也对以下帖子感兴趣

文章有问题?点此查看未经处理的缓存