The correct answer is - cyanobacteria.
The atmospheric oxygen came from the cyanobacteria. These were one of the earliest living organisms on Earth. The cyanobacteria was using photosynthesis in order to create its own food. The photosynthesis process requires sunlight, carbon dioxide, water, and oxygen. The oxygen is mostly released as a waste product from the process of photosynthesis, thus the cyanobacteria were literally releasing oxygen that was ending up into the atmosphere. As more and more cyanobacteria there were across the planet, more and more oxygen they were releasing into the atmosphere, slowly changing the composition of the atmosphere, and setting the basis of it as we know it now.
Answer
• Driving a more fuel-efficient car to eliminate “gas guzzling”
• Reducing heating needs
• Reducing lighting needs
Explanation
The three best strategies employed worldwide for conserving non-renewable energy resources are Reduce, Reuse and Recycle( 3R’s). Energy users are encouraged to increase reliance on renewable energies such as solar, wind and geothermal to aid in conserving the scarce fossil fuel that remain.
Walking and biking can be used as a strategy to cut down gas guzzling and manage the limited nonrenewable oil resources. One popular way of heating homes is oil heating. However, the conserve the oil, home owners are supposed to put up storm windows and insulate homes including caulking cracks around doors and windows to reduce heating costs. When using natural gas, users can reduce energy wasting by keeping the thermostat at 70 degrees and shutting off heat when not in use.
Answer:
land features: fostered eastern valleys. western mountains and central plains.
water features: black-blue lakes, numerous rivers and swamps.
climate: very cold winters and short cool summers.
location: North America bordering the north Atlantic ocean to the east, North pacific ocean on the west and Artic ocean on the North.
natural recourses: energy, mineral and timber, natural gas and coal.
Explanation:
Answer:
It just does
Explanation:it’s a planet
