By Amy Fontinelle  Ethical investors who care about
environmental issues want companies to minimize their negative
impact on the environment. When choosing which companies to
invest in, they commonly focus on the following aspects of a
company's operations: energy, waste and pollution; natural
resource conservation and treatment of animals.  Energy, Waste
and Pollution All companies need to use energy, and all
companies generate waste products. When we think of energy use
and pollution, most of us probably think of manufacturers, but
even the smallest operations need electricity to power their
lighting and computer systems. Some ethical investors seek out
companies that don't pollute much in the first place. Others
seek out companies that have purposefully minimized their
environmental impact, while still others seek out the worst
offenders and plan to change their ways.  One way companies can
reduce their energy use is to operate out of green buildings.
Green building features, that reduce energy use, includ