Question

1. choose the correct answer. most scientists think that global warming is caused by ____. people natural events 14) select all that apply. which three things are true about fossil fuels? coal is the dirtiest fossil fuel. fewer fossil fuels are burned today than were burned years ago. fossil fuels are cleaner than solar and wind energy. burning fossil fuels may cause global shrinking. natural gas is the cleanest fossil fuel. burning fossil fuels puts carbon dioxide into the air.

Explanation:

Question 13

Most scientists attribute global warming primarily to human activities like burning fossil fuels, deforestation, etc., which release greenhouse gases. Natural events have minor short - term impacts, but the dominant cause is human - related. So the correct option is "people".

1. "Coal is the dirtiest fossil fuel": Coal combustion releases large amounts of pollutants like sulfur dioxide, particulate matter, and carbon dioxide, so this is true.
2. "Fewer fossil fuels are burned today than were burned years ago": In reality, the consumption of fossil fuels has generally increased over the years due to industrialization and population growth, so this is false.
3. "Fossil fuels are cleaner than solar and wind energy": Solar and wind energy produce little to no pollution during operation, while fossil fuels release pollutants. So this is false.
4. "Burning fossil fuels may cause global shrinking": There is no such concept as "global shrinking" related to fossil fuel burning. This is false.
5. "Natural gas is the cleanest fossil fuel": Among fossil fuels (coal, oil, natural gas), natural gas produces the least amount of pollutants per unit of energy when burned. So this is true.
6. "Burning fossil fuels puts carbon dioxide into the air": Fossil fuels (like coal, oil, gas) are carbon - based, and when burned, they react with oxygen to produce carbon dioxide. So this is true.

So the three true statements are "Coal is the dirtiest fossil fuel", "Natural gas is the cleanest fossil fuel", and "Burning fossil fuels puts carbon dioxide into the air".

Answer:

people

Question 14