NEED HELP ASAP PLZ Write T or True if the statement is true; write For False if the statement is false.
1. The greenhouse effect is a natural process that supports life on the earth for millions
years.

2. The majority of the Earth's atmosphere is composed of nitrogen and oxygen,
greenhouse gases comprise only a tiny fraction of the atmosphere.

3. All greenhouse gases are created as a result of human activity.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.