1 Pitchers must throw a pitch within 20 seconds of receiving the ball. 2  Clocks posted in each dugout will count down the 20 seconds. 3  There will be a maximum break between innings of 2:05, with a clock keeping track. 4  Hitters must be in the batter's box by 1:45. 5  If the hitter's not ready, the umpire can call a strike. If the pitcher doesn't throw a pitch by 2:05, the umpire can call a ball. 2  Teams will have a maximum of 2:30 to change pitchers, with the clock starting as soon as the reliever enters the playing field. 3  Teams are limited to a maximum of three mound visits per game, not including pitching changes.
The Clean Air Act, originally passed in 1973 and amended in 1990, is a United States federal law designed to protect human health and the environment from the effects of air pollution.
Air quality is much worse in eastern Europe and in urban areas of developing countries than it is in the U.S. and western Europe. True. The 1970 Clean Air Act mandated that the primary air quality standards that the EPA was to establish to safeguard human health were to be set without regard to pollution control costs.