Material through which water flows is permeable. This material can be either natural or artificial. Naturally permeable material can be clean sand and gravel for example, or a sandstone and in the latter case the sandstone can have both porosity which is not synonymous with permeability as the pores must be connected to be permeable. An impermeable membrane could be used to line ditches for example to prevent leakage near mines.
Answer:
Renewable Energy
Pros: Cleaner than fossil fuel, an abundance out there, can be used without interruption
Cons: Takes alot of energy to produce, may be seasonal and competes with food production
Explanation:
Two examples of organisms who do not reproduce sexually are:
1. Yeast
2. Hydra
