How do i email President Obama?

I am the descendant of a forgotten band of Cherokee people who were removed from ny home town (trail of tears)and Scottish ancestors who came here seeking freedom and lived in harmony with local Native Americans until the calvary intervened. I am 50 this year and a U.S. Army veteran with an honorable discharge who served in Europe just before the Berlin wall came down.I have several issues that are burdening my heart,and I wish to express them in a humble and respectful way to the President and anyone else in our government who really cares about these issues enough to act on them.I am scared to express my feelings openly for fear of retribution,but as a guardian of Earth Mother and an American who loves freedom for all.I must.The first issue is energy.It is obvious that there are ways to power cars and generate electricity not only environmentally pollution-free ,but also free individuals and the country from the energy monsters who burn coal,destroy mountains,poison all life that lives in the water,etc.Building nuclear power plants to replace foreign oil is not going forward,it is going backward.I know the corporations who make like 44 billion dollars a year need a good excuse to keep us enslaved to their giant network,and atomic energy is an excuse to do this.Native American traditional people call North America Turtle Island for a reason.Sometimes the turtle moves around or pulls it's head,legs,and tail inside it's shell.Sometimes it submerges in the water a little.What will be our option when those nuclear plants and atomic waste pour into the oceans?What will be our option when a terrorist targets one or more of these facilities successfully?Leadership that follows this insane alternative with the knowledge of the consequences obviously is controlled by these energy monsters and could care less about life on earth or future generations.