What are two problems associated with the use of solar energy?

Actually, there are a lot of problems associated with the use of solar energy but would like to highlight at least two. The first one that hampers the use of it is its cost. The second one is land use and habitat loss, water use, and the use of hazardous materials in manufacturing.

the man is bald so he has no hair to get wet

step 1: nitrogen fixation- conversion of atmospheric no₂ into forms useful to plants by lightning, bacteria, and cyanobacteria.

step 2: nitrification-process of converting ammonia to nitrite or nitrate.

step 3: assimilation-plant roots absorb new form of nitrogen.

step 4: ammonification-conversion of organic nitrogen to ammonia by bacteria involved in decomposition.

step 5: denitrification-bacteria turns the decomposed matter back into n₂o, which is released into atmosphere; repeat cycle.