The leading cause of disability in adults in the united states is

Heart disease
Heart disease is the leading cause of death in the United States, and forces many to apply for disability benefits every year.

Mental illness is the leading cause of disability in U.S. citizens ranging in ages from 15 to 44, according to National Institute of Mental Health (NIMH) statistics.

Mechanical energy from wind nonrenewable resource

B.) nitrogen fixationnitrogen fixation is the process of nitrogen molecules seeping into the soil and inside plant roots and bacteria. it gives more "life" to plants