The biosphere is the region of the surface and atmosphere of the earth (or another planet) occupied by living organisms. It contains all the living things in the world: plants, animals and bacteria. It includes other layers of the atmosphere which are called the lithosphere, the troposphere and the hydrosphere. The lithosphere is the other region of the earth, the troposphere is the lower region of the atmosphere and the hydrosphere is the region of lakes, oceans, streams, ice and clouds that make up earth's water resources. There are over 30 millions species on this region of the planet, and the number of different organisms in an ecosystem is called biodiversity. The more biodiversity the more stable the ecosystem is.But it is still inevitable for each and every organism to adapt to their surroundings and even change it at times. But the biosphere never remains the same, no matter what. And the effects can either be negative or positive. The top species on the biosphere are humans, and they affect the area in both good and bad ways.
Humans are the only species that make their ecosystem adapt to them instead of the other way around. This is why they have the most effect on the biosphere. Some things humans have done that improves the condition of the biosphere would be selective breeding. By putting the best of the best together, which normally cannot occur in nature naturally, this gives species a better opportunity to survive. In regards to crops, this allows them to survive harsher weathers and insect invasions that they would normally die out in. It also improves taste, size and amount given in a single harvest. By repeating this process the plant will naturally start having these positive qualities and when it starts to grow wild it provides much more food for the animals around. Selective breeding also happens with animals and improves their taste, size and other specific things depending on the reason for the breeding. For instance, special breeds of cattle are bred for high-quality meat yield so less the cows with low-quality meat can be saved from slaughter. Humans have also domesticated animals which protects them from their predators, keeping them away from the chance of extinction.
Pollutants are substances that have accumulated in amounts that have adverse effects on the health, activity or survival of organisms (which includes humans who are the cause for such pollution). How organisms interact with the atmosphere, ocean and land determine the living conditions throughout the biosphere. Humans are the major players in these interactions because of our population size, technology, and the fact that they're constantly altering the natural environment to fit their needs. One of the things humans has changed over the years is the very air of the biosphere. The United States alone releases over 700,000 tons of air pollutants each and every day. And what makes up this pollution are carbon oxides, sulfur oxides, nitrogen oxides, volatile organic compounds and photochemical oxidants. A few things that come as a result of these toxins is acid rain and smog. Acid rain is causes by sulfur and nitrogen oxides, which comes from cars, and fuels that react with water to form a sulfuric acid and nitric acid precipitation. This acid rain has killed trees, fish, frogs and can lower the pH of lakes, ponds and soil. Smog is a grey air that is result of burning fossil fuels and pollutes the air with dust, smoke, soot and ashes. Another thing humans produce is solid waste, much of what is non-biodegradable. In a natural ecosystem when one organism excretes, it becomes another organisms food. It is a constant recycling of nutrients. But this isn't the case with humans. The waste just starts piling up in land fills causing even more gases to invade the atmosphere.
It's hard to say if the good humans do for the biosphere outweighs the bad because only time can tell. With the constant growth of population there's always competition for space, which usually results in overcrowding already overpopulated cities. The gas layer that protect the Earth from UV irradiation is thinning because of all of the toxic gasses going up into the air. It has already caused one hole of the largest ozone holes over Antarctica. Though this seems not to be enough to snap the human race to it's senses and start doing more to protect the environment. Hopefully, they're able to start thinking clearly before the biosphere is completely destroyed.