Ships have been using ballast water since the 19th century for stability. In the past, ships would discharge water from the ballast en route and at ports of call. Both United States and Australian ports receive more than 79 million metric tons of ballast each year. Currently, military and commercial ships are asked to perform a mid-ocean ballast exchange before arriving at port. What ecological issues is the mid-ocean exchange trying to prevent

i think it's they require warm air

explanation:

tornados usually happen when it's raining right so when it's raining it cools down so if the temperature keeps changing then i think a tornado occurs sorry if it's wrong

1. efficient use of space

2. elimination of groundwater contamination

3. energy generation

4. lower carbon footprint

it provides an alternative energy pathway for the reaction to proceed.

a catalyst is a substance that speeds up the rate of a chemical reaction but is not consumed during the course of the reaction.

catalysts increase the rate of reaction without being used up. they do this by lowering the activation energy needed. with a catalyst, more collisions result in a reaction, so the rate of reaction increases. different reactions need different catalysts.

a catalyst works by providing an alternative reaction pathway to the reaction product. the rate of the reaction is increased as this alternative route has a lower activation energy than the reaction route not mediated by the catalyst.