Question

methane is a potent greenhouse gas, primarily released from livestock digestion. melting glaciers threaten resources. renewable energy sources like help reduce greenhouse gas emissions. the burning of is a significant source of carbon dioxide emissions.

Explanation:

1. Melting glaciers threaten water resources as they are a major source of fresh - water.
2. Renewable energy sources like solar, wind, hydro help reduce greenhouse gas emissions as they don't burn fossil - fuels.
3. The burning of fossil fuels (such as coal, oil, and gas) is a significant source of carbon dioxide emissions.

Answer:

1. water
2. solar (or wind or hydro etc., any common renewable energy source)
3. fossil fuels