Sec. 101. (a) The Congress finds - 
     (1) that the  predominant part of the Nation's population is
  located in  its rapidly expanding metropolitan  and other urban
  areas, which generally cross the boundary lines of local juris-
  dictions and often extend into two or more States;
     (2) that the growth in the amount and complexity of air pol-
  lution brought about  by urbanization, industrial  development,
  and  the increasing  use  of motor  vehicles,  has resulted  in
  mounting dangers  to the  public health and  welfare, including
  injury  to agricultural crops and  livestock, damage to and the
  deterioration  of  property,  and  hazards to  air  and  ground
  transportation;
     (3) that air pollution prevention (that is, the reduction or
  elimination, through any measures,  of the amount of pollutants
  produced or created at the source) and air pollution control at
  its source is  the primary responsibility  of States and  local
  governments; and
     (4)  that Federal  financial  assistance  and leadership  is
  essential for  the development of  cooperative Federal,  State,
  regional,  and  local  programs  to  prevent  and  control  air
  pollution.
(b) The purposes of this title are - 
     (1) to protect and  enhance the quality of the  Nation's air
  resources  so as to promote  the public health  and welfare and
  the productive capacity of its population;
     (2) to initiate and accelerate a national research and deve-
  lopment  program to achieve  the prevention and  control of air
  pollution;
     (3) to  provide technical and financial  assistance to State
  and local  governments in  connection with the  development and
  execution  of  their  air  pollution  prevention   and  control
  programs; and
     (4) to encourage and assist the development and operation of
  regional air pollution prevention and control programs.
(c) Pollution Prevention.- A  primary goal of this Act is  to en-
courage or otherwise promote reasonable Federal, State, and local
governmental actions, consistent with the provisions of this Act,
for pollution prevention.
[42 U.S.C. 7401]