Geothermal energy = Eco-friendly
Cut down trees = not eco-friendly
Biomass instead of coal = eco-friendly
Turn lights on during the day = not eco-friendly
Carpool = eco-friendly
Compost = eco-friendly
Nuclear envelope is the answer
Hi~~
Human invasive use of outdoor and artificial lightning (AKA light pollution) has made us less able to see the sky and the stars. Light pollution affects our visual abilities to see objects in the sky by altering the colors and contrast of the night-sky, which makes astronomers less able to study the skies.
Answer:
1 is b
2 is c
3 is either b or c
i don't really remember 4, sorry
Explanation:
