1 The best aerobic workout to build endurance is one you can do for a sustained amount 2  â¦. Tips for Building Endurance and Strength Tips for running faster are in high demand across the Internet. 3  Runners everywhere are trying to figure out how to increase their speed and endurance.
Rivers are used for transportation, irrigation, generating energy and performing work, such as turning waterwheels. Rivers are also vital sources of fresh water for both industrial and residential applications.
Many towns and factories are built near rivers so that they can use water from the river. But sometimes the water is not cleaned before it is put back into the river. This dirtying of water (also air and soil) is called pollution. Pollution can be in a variety of forms: 1  Rubbish like crisp packets, newspaper and bags.2  Oil. 3  Poisonous substances.actories. Factories use water from rivers to power machinery or to cool down machinery. Dirty water containing chemicals is put back in the river. Water used for cooling is warmer than the river itself, and this is also a form of pollution.