C. River valley I believe
Mars' atmosphere is made mostly of carbon dioxide, much like Venus. It is not as hot as Venus because the Martian atmosphere is extremely thin. Venus has a thick layer of carbon dioxide gas surrounding the planet. This is why it is the hottest planet in the solar system even though it is not the closest to the sun. Carbon dioxide is a greenhouse gas so it has the ability to trap infrared radiation. The atmosphere on Mars is thin and so it will not trap as much heat as the Venusian atmosphere.
Sun= 696,340 km
earth= 6,371 km
moon= 1,737.1 km
Answer:
d. setting a goal to provide 80% of electricity from renewable resources by 2050
Explanation:
Germany takes an very good step towards the reduction of carbon dioxide.We know that carbon dioxide is a green house gas.The green house gases are increasing the temperature of the earth and this is known as global warming.So it become necessary to reduce the production of green house gases.
Germany government said that up to 2050 they will use the renewable energy source to produce power.
So the option d is correct.
d. setting a goal to provide 80% of electricity from renewable resources by 2050