Factories pollute the air by pumping out chemicals that are harmful for all the living things. That is why there is acid rain and global warming. There is a lot of science involved in this, but I don't feel like doing eight hours of research, so I will just put what I know down. Factories can pollute the environment through thermal pollution, chemical pollution, air pollution, noise pollution, for a few examples. Thermal pollution is when hot water is dumped into cool water in a river, lake, pond or bay. The difference in temperatures can promote algae growth, kill of native fish or wildlife, or it might cause disruptions in the water that causes the water to change temperature, also causing major problems with wildlife. Chemical Pollution is when chemicals are exposed to the environment, either by dumping them into sewage plants, where excess waste ends up in the ground. A good example of this is nuclear waste. This needs to be treated carefully or else it could completely destroy an area. Air pollution is when pollution is mixed in with the air. (Self-Explanatory) Noise pollution is when a factory causes a lot of noise... enough to effect the surrounding environment.
No. No change in orbit or explosiveness!
What will happen is that the mean average temperature of the atmosphere will increase, resulting in ice caps melting, which will cause sea levels to rise, and triggering climatic changes. These changes will alter the type of crops which can be grown in a given location, cause species to change their migratory habits, and change weather patterns. The Earth itself, the planet, will not be affected, nor will the planet's orbit around the Sun be affected.
With regard to the oceans rising - the impact will not be entirely due to the added water generated by melting ice caps. The water in the oceans will become less dense due to its being warmer and less saline. Less dense water will not have the weight to compress the deep waters as tightly and they will expand slightly. It is estimated water at the bottom of the Pacific is compressed by about 1.08% at 4000 m. Releasing this pressure by even a small amount could result in a depth increase of several meters.
(Reference:See the link below.)
# First open space serves an aesthetic function by simply giving people a pastoral, natural parkland to allow them to remove themselves, if even for a while from an urban setting.
# At the same time, it can if planned properly, give an area for passive recreation.
# Open space can give buffer zones to riparian corridors which at one time give runoff water a chance to be cleansed both mechanically (grass strips slow water and allow sediments to drop before entering a stream) and chemically (water is absorbed into the undisturbed soil and the harmful chemical components are bound up by the clays before they reach the stream).
# The last way is that they give, when strung together, wildlife corridors that allow animals unbroken pathways from one area to another.
These are just a few of the most important reasons for maintaining open space in an urban setting.
Yes, electricity is a renewable resource.
HCL or CLR are okYes, however it may not be the best choice. Muratic acid (HCL) is Hydrocloric acid and used in swimming pools and labs to adjust pH. It also generates free chlorine which may be bad for some fish and your containers.
Not all plastic tanks are acid safe so check the codes for HDPEhttp://www3.sympatico.ca/n.rieck/docs/plastic_codes.HTML
Then TEST a small spot.
Better yet a hard scale or lime remover like CLR may work better and dissolve faster.
A strong Vinegar or a weak Sulphuric Acid solution would also be better than a HCL solution for fish.
Most fish are very pH sensitive so rinse very well...