Why are bacteria such as Rhizobium and cyanobacteria so important in thenitrogen cycle?
A. They return nitrogen gas to air
B. They fix atmospheric nitrogen gas for the food chain
C. They decompose dead plants and animals
D. They build protein in plants

Fighting for Clean Air in our National Parks

Air pollution is one of the most serious threats facing national parks, harming visitors’ health, clouding scenic views and altering our climate.The air pollution affecting national parks — and the rest of the country — results from the burning of fossil fuels by power plants, oil and gas development, vehicles, agriculture, industrial emissions, and other sources. NPCA works to make sure our nation’s air laws are strong, to hold polluters and government accountable to those laws, and ultimately, to reduce the air pollution that harms our parks, climate and communities.

Defending Federal Laws and Regulations

The Clean Air Act – which has helped improve air quality throughout the nation and the National Park System – is now under consistent threat as the Environmental Protection Agency works to roll back regulations, attack the use of science and offer polluters loopholes. NPCA advocates to defend and strengthen the clean air laws that protect park skies. We speak out for science and guard against policies driven only by politics and private industry.

Holding Polluters and Governments Accountable

Picture park skies free of pollution. While this sadly isn’t the case today, NPCA strives to make sure that parks are on the right track and that air pollution harming parks is reduced. We do this by helping to secure strong state plans to limit haze-causing and climate-altering pollution, and by defending existing plans – in court, if necessary.

Advocating for Pollution Reduction

Clean air laws are meaningless if polluters and the government don’t follow them. NPCA vigilantly monitors for sources that violate their permits or when officials aren’t following through on the safeguards in place to protect parks. We also look for opportunities to collaborate and work in state, local or regional processes to prevent threats of new pollution and help reduce harmful emissions. Learn about our work in California and Utah.

Answer:

macronutrients

Explanation:

macronutrients are important for growing plants. the main macronutrients are nitrogen, Potassium, and phosphorus.

Answer:

The second answer.

Explanation:

The provided question is not complete as it lacks the appropriate choices for the answer, however, the correct choices are:

Which of the following will NOT prevent many bacterial infections?

a. allowing foods to cool completely before refrigerating

b. washing hands and surfaces with soap and water

c. storing food in a refrigerator

d. heating objects to very high temperatures

Answer:

The correct answer would be - allowing foods to cool before refrigerating.

Explanation:

Bacterial infections can be prevented by many processes such as washing hands with soap and water thoroughly for a minimum of twenty seconds. Storing food in the refrigerator helps the food to be fresh and infection-free from various microbes.

Heating the food, water, and tools to very high temperature helps in killing the bacteria present in these and leads to bacterial infection. Cooling the food before storing it in the refrigerator may cause bacteria to infect the food.

Explanation:

i didnt pay attention last year soooo sorry