(乙醇). But discoveries of huge petroleum deposits(储量)kept gasoline and diesel(柴油)cheap for decades, and biofuels were largely forgotten. However, with the recent rise in oil prices, along with growing concern about global warming caused by carbon dioxide emissions, biofuels...
And this is carbon that was in the atmosphere millions of years ago. So what happens is: when we burn this carbon, ok, it doesn't really release a whole lot compared to the amount that's already there in the atmosphere, but it adds to the pool. ...
For instance in the Carboniferous period 360 MYA to 299 MYA (MYA=millions of years ago), carbon dioxide was being captured by trees and tree-like plants and laid down in conditions without oxygen that would eventually become the coal deposits that the earth has today. In the very early atmo...
MALE PROFESSOR: Right. Carbon dioxide…We hear a lot about carbon these days, no?“Carbon emissions,”“carbon burning,” leaving a “carbon footprint”…so it'd be easy to assume that any form of carbon burning is necessarily a bad thing.But the fact is, it's not quite that simple....
剑桥雅思11Test4Section4听力原文与答案 The use of soil to reduce carbon dioxide in the atmosphere 剑桥雅思11听力第四套题目第四部分的主题为土壤在吸收大气中二氧化碳的作用。录音大体可以分为三部分,分别介绍了Rattan Lal的发现,土壤吸收二氧化碳的原理,以及未来的发展。
Did you know that scientists have been able to study climate data from hundreds of thousands of years ago? By looking at air bubbles trapped in glaciers, tree rings, and sediment on the ocean floor, scientists have measured an increase in carbon dioxide in the atmosphere due to changes in ...
aWe add carbon dioxide to the air when we burn things, especially fossil fuels.Fossil fuels are energy sources formed from the remains of plants and animals that lived millions of years ago.Coal,oil,and natural gas are all fossil fuels.People in the United States and other countries started ...
Oregon’s state geologist is pitching a novel idea of using the region’s rocky basalt layer – born of lava that flowed millions of years ago from cracks in the Earth’s crust – to be a bank for storing planet-warming carbon dioxide. ...
[00:46.79]They want to discover how a natural process changed carbon dioxide [00:53.53]into minerals such as limestone and marble millions of years ago. [00:59.65]Peter Kelemen is a geochemist at Columbia University's Lamont...
THE amount of carbon dioxide in the Earth’s atmosphere grew at record rate in 2016 to a level not seen for millions of years, potentially fueling a 20-meter rise in sea levels and adding 3 degrees to temperatures, the United Nations said yesterday. ...