Man is getting benefits from nature in so many ways. One of the way is sun, we all getting benefited from. You should know that the vitamin "D" made in our boons by sun rays with out any cost. If we focus the sun is providing us energy / power where the cast of energy is not very high. Alternate energy system is developing very rapidly around the world and a one branch of alternate energy is Solar Energy.
The sun is sole and only source to get the solar energy. The solar energy is being used commercially in many parts of the world. Now it is becoming famous in homes and domestic use. Now we can light our home, feed power to water pumps and can do lots more things with solar energy. Now a days many families are using solar water heaters, solar oven, solar electric power in their homes and getting benefits form it.
A more interesting point I want to share that using solar energy you make no harmful gases, no noise and with out polluting your natural environment you can fulfill your home based energy requirements in a comparatively cheap way. In some areas whereas wind blow all the time and sun spreads its shine for longer period of the day we can get benefit from nature two ways.
Like we can erect a mini wind mill and can also use solar panels at same time. The power produced by both the systems / sources will be stored in D.C batteries and then will converted to A.C for the utilizing purposes(we can use DC system as per requirements). When air will blow at some low speed the solar panels will be work to feed the batteries and when sun will disappeared the wind mill will do the same to feed the batteries. And resultantly we will get the benefits in form of energy with out paying a single penny for the running expenditures of power.
