Explain how do single fixed and single movable Pulley make our work easier

The softest and hardest minerals are: softest hardest

Which are advantages of renewable resources? check all that apply. renewable energy supplies are completely reliable everywhere. some renewable resources will never be used up. little or no waste is produced by renewable resource plants. electricity can be generated in large quantities. many renewable energy facilities have lower operating costs.

Which component of the earth’s atmosphere is decreased due to photosynthesis?