Prayers offer peace of mind and a lot of hope/ Prayers offer a lot of hope and peace of mind.
It's the last one. we know this because it talks about how even with the smart hands of a scientist, the plan is not completely foolproof, or safe
Answer:
People are trying to lower fossil fuel usage and greenhouse gasses, so using renewable resources. For example, wind and sun. Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air, so limiting pollution will help acid rain.
