[aj.gilchuk]

#1; the water cycle is proven.
we drink water, we urinate into the toilet, the toilet drains into the sewer, the sewer system empties treated waste into lakes and rivers, the lakes and rivers dilute the waste and the water is re-consumed by another town down the river or across the lake. this repeats. Also water evaporates in heat and turns to water vapor (a gas) this gas rises until it is cooled in the sky. it then re condenses into rain and falls to the ground.
an example of condensation is: on a cool day three or four people are sitting in a car with the windows rolled up and the car off. after a short time they may notice a fog forming on the window. this is the water vapour they have expelled through breathing condensing on the cool windows. If this goes on long enough the fog will show visible water droplets.

#2 Sea mammals that can't filter the salt out and absorb water through there skin receive there fresh water from the fish they eat. the fish are able to filter out the salt inside their bodies.