the "invention" (or development) of chlorophil by plants
Oxygen began to build up in the atmosphere and oceans through the process of photosynthesis by early cyanobacteria and algae. These organisms converted carbon dioxide and water into oxygen and organic compounds, releasing oxygen as a byproduct. Over time, the accumulation of oxygen in the atmosphere and oceans led to the Great Oxidation Event around 2.4 billion years ago.
You could not build a fire in the normal way on the planet Uranus since there is no oxygen in the atmosphere of that planet. However, if you were on Uranus, in your sealed spaceship with its own breathable atmosphere, and you wanted to build a fire there (which would probably be a terrible idea since it would use up your oxygen supply) that would be possible.
Billions of years ago, Earth's early atmosphere likely contained little to no oxygen. Oxygen began to accumulate in the atmosphere around 2.5 billion years ago due to the process of photosynthesis by early cyanobacteria and other organisms, which produced oxygen as a byproduct. This led to the gradual build-up of oxygen levels in the atmosphere over millions of years.
Space and evolved from volcanic processes.
they will eventually run out, also they cause a build up of co2 in the atmosphere causing the greenhouse effect.
If the oxygen cycle goes off balance, it can lead to a decrease in atmospheric oxygen levels, which can have negative impacts on aerobic organisms that require oxygen to survive. This imbalance can disrupt ecosystems, leading to decreased biodiversity and harm to plant and animal populations. It may also contribute to global climate change as oxygen is a critical component in regulating the Earth's atmosphere.
Carbon dioxide build-up in the atmosphere contributes to climate change by trapping heat from the sun, creating a greenhouse effect. This leads to rising global temperatures, melting ice caps, changing weather patterns, and other negative impacts on the environment.
Scientists agree that significant amounts of oxygen were first put into the atmosphere by cyanobacteria which used and still use a process called photosynthesis to convert carbon dioxide and water into sugar and oxygen. The sugar is then used to build cell walls and in the metabolism. When plants evolved, they too carried out photosynthesis, putting even more oxygen into the atmosphere. Prior to the evolution of cyanobacteria, the metabolisms of organism relied on anaerobic processes.
People start burning fossil fuel. This releases greenhouse gases that build up in the atmosphere. This traps more heat and causes global warming. The warming adds extra energy into the atmosphere causing climate change.
People start burning fossil fuel. This releases greenhouse gases that build up in the atmosphere. This traps more heat and causes global warming. The warming adds extra energy into the atmosphere causing climate change.
Build up of lactic acid - and thus a change in pH.
The oxygen in Earth's atmosphere was released by photosynthetic organisms, such as cyanobacteria and early algae. These organisms use sunlight to convert carbon dioxide and water into oxygen as a byproduct. Over billions of years, this process helped build up the oxygen levels in the atmosphere to support aerobic life forms.