Center for Science Education

Biogeochemical Cycles

https://scied.ucar.edu/learning-zone/earth-system/biogeochemical-cycles

There are a few types of atoms that can be a part of a plant one day, an animal the next day, and then travel downstream as a part of a river’s water the following day. These atoms can be a part of both living things like plants and animals, as well as non-living things like water, air, and even rocks. The same atoms are recycled over and over in different parts of the Earth. This type of cycle of atoms between living and non-living things is known as a biogeochemical cycle.

All of the atoms that are building blocks of living things are a part of biogeochemical cycles. The most common of these are the carbon and nitrogen cycles.

Tiny atoms of carbon and nitrogen are able to move around the planet through these cycles. For example, an atom of carbon is absorbed from the air into the ocean water where it is used by little floating plankton doing photosynthesis to get the nutrition they need. There is the possibility that this little carbon atom becomes part of the plankton’s skeleton, or a part of the skeleton of the larger animal that eats it, and then part of a sedimentary rock when the living things die and only bones are left behind. Carbon that is a part of rocks and fossil fuels like oil, coal, and natural gas may be held away from the rest of the carbon cycle for a long time. These long-term storage places are called “sinks”. When fossil fuels are burned, carbon that had been underground is sent into the air as carbon dioxide, a greenhouse gas.

Recently, people have been causing these biogeochemical cycles to change. When we cut down forests, make more factories, and drive more cars that burn fossil fuels, the way that carbon and nitrogen move around the Earth changes. These changes add more greenhouse gases in our atmosphere and this causes (MOSTLY BENEFICIAL-MM) climate change.

The Carbon Cycle

The element carbon is a part of seawater, the atmosphere, rocks such as limestone and coal, soils, as well as all living things. On our dynamic planet, carbon is able to move from one of these realms to another as a part of the carbon cycle.

• Carbon moves from the atmosphere to plants. In the atmosphere, carbon is attached to oxygen in a gas called carbon dioxide (CO₂). Through the process of photosynthesis, carbon dioxide is pulled from the air to produce food made from carbon for plant growth.
• Carbon moves from plants to animals. Through food chains, the carbon that is in plants moves to the animals that eat them. Animals that eat other animals get the carbon from their food too.
• Carbon moves from plants and animals to soils. When plants and animals die, their bodies, wood and leaves decays bringing the carbon into the ground. Some is buried and will become fossil fuels in millions and millions of years.
• Carbon moves from living things to the atmosphere. Each time you exhale, you are releasing carbon dioxide gas (CO₂) into the atmosphere. Animals and plants need to get rid of carbon dioxide gas through a process called respiration.
• Carbon moves from fossil fuels to the atmosphere when fuels are burned. When humans burn fossil fuels to power factories, power plants, cars and trucks, most of the carbon quickly enters the atmosphere as carbon dioxide gas. Each year, five and a half billion tons of carbon is released by burning fossil fuels. Of this massive amount, 3.3 billion tons stays in the atmosphere. Most of the remainder becomes dissolved in seawater.
• Carbon moves from the atmosphere to the oceans. The oceans, and other bodies of water, absorb some carbon from the atmosphere. The carbon is dissolved into the water.

Carbon dioxide is a greenhouse gas and traps heat in the atmosphere. Without it and other greenhouse gases, Earth would be a frozen world.

Carbon cycle

https://ugc.berkeley.edu/background-content/carbon-cycle/

While most of the Earth’s carbon can be found in the geosphere, carbon is found in all living things, soils, the ocean, and atmosphere. Carbon is the primary building block of life, including DNA, proteins, sugars and fats.  One of the most important carbon compounds in the atmosphere is carbon dioxide (CO₂),

Death by GREENING!

https://www.marketforum.com/forum/topic/69258/

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4.1 Oxygen, Carbon Dioxide, and Energy

https://www.ck12.org/book/human-biology-breathing/section/4.1/

Carbon Dioxide Levels Chart

     https://www.co2meter.com/blogs/news/carbon-dioxide-indoor-levels-chart          

What is an acceptable CO2 level in a room?

Normal CO2 levels in fresh air is approximately 400 ppm (part per million) or 0.04% CO2 in air by volume. The table below shows the effects of increased CO2 levels in an enclosed space as a percent of air by volume.

This site is selling CO2 meters. I made some corrections and adjustments to their information below based on authentic science. Those are underlined and in CAPS. 

metmike: The increase in beneficial CO2, instead of killing the planet has rescued the planet from near CO2 starvation 150 years ago!

290 ppm(parts per million) was dangerously low for life.

Currently, 420 ppm is still LESS THAN half the OPTIMAL level for most life on the planet.

Greenhouse Carbon Dioxide Supplementation

https://extension.okstate.edu/fact-sheets/greenhouse-carbon-dioxide-supplementation.html

Generally, doubling ambient CO₂ level (i.e. 700 to 800 parts per million) can make a significant and visible difference in plant yield. Plants with a C₃ photosynthetic pathway (geranium, petunia, pansy, aster lily and most dicot species) have a 3-carbon compound as the first product in their photosynthetic pathway, thus are called C₃ plants and are more responsive to higher CO₂ concentration than plants having a C₄ pathway (most of the grass species have a 4-carbon compound as the first product in their photosynthetic pathway, thus are called C4 plants). An increase in ambient CO₂ to 800-1000 ppm can increase yield of C₃ plants up to 40 to 100 percent and C₄ plants by 10 to 25 percent while keeping other inputs at an optimum level. Plants show a positive response up to 700 to need of 1,800 parts per million, but higher levels of CO₂ may cause plant damage

Figure 1. Relation between CO₂ concentration and rate of plant growth. Source: Roger H. Thayer, Eco Enterprises, hydrofarm.com. Redrawn by Vince Giannotti.

More CO2 = More Food for all life

That is indisputable!