Air is not just one gas. It is a mixture of different gases. Because we can't see the gases in the air, it is difficult to think about them.There are four main gases in the air: oxygen (氧气), nitrogen (气). carbon dioxide (二氧化碳)and argon().If 1,000 dots can represent ...
Gases that make up outdoor air: this article provides a table of the components in outdoor air - a list of the various gases found in air by percentage. The table gives the percent of each gas found in typical outdoor air, includes citations of authorita
Air pollution is the contamination of air in our atmosphere by harmful gases and particulate matter that is not naturally found in the air. Air pollution is caused by many different sources, including the burning of fossil fuels, vehicle exhaust and industrial processes....
A. The air is very clean now. B. People don't need to worry about air pollution. C. This device can help improve air quality. D. All harmful gases can be detected by this device. 相关知识点: 试题来源: 解析 C。文章说新设备能检测空气中的有害气体,这有助于提高空气质量。A选项空气现...
What can be done to reduce greenhouse gases? Greenhouse gases can be reduced by phasing out fossil fuels, such as coal, oil and gas, and moving to renewable energy, such assolarandwind. We can all play a part in protecting our planet, from simple daily changes, like reusing and recycling...
Environmental pollution is that the harmful things are put into the air, water, and soil.These things can make our planet sick and affect the life on it.Sources of Pollution:Air pollutionCars, factories, and power plants (电厂) release harmful gases into the air.Water pollution...
What rare gases are in the atmosphere? Earth's Atmosphere: Earth's atmosphere surrounds the planet, gradually thinning the farther away from Earth's surface it gets. Commonly called air, there is more in the atmosphere than just oxygen. ...
What gases can be a threat when they are part of the air inside your home? How would you determine if they are present? At what level do they present a threat? Air Pollution: Air pollution is pollution that is mainl...
Air is a mixture of gases primarily nitrogen and oxygen essential for respiration, whereas the atmosphere is Earth's protective layer of gases, encompassing air, water vapor, and other components.
B 5 If the earth has more trees, greenhouse gases will be reduced, and this will help stop global warming. What's more, they improve human health by producing oxygen(氧气) and improve air quality. D 6 In Belgium, one organisation which wants to protect forests works with farmers to help...