d. O2
This is because CO2 (Carbon Dioxide), energy (sunlight), and H2O (water) are all outputs of cellular respiration.
Answer:
The most appropriate answer would be B. Have factories recycle water.
Recycling of water refers to the process which processed the waste water and convert it to reusable form.
It can be reused for various purposes:
- Agriculture: irrigating different types of crops, aquaculture etc
- Urban uses such as irrigating golf courses, public parks, private gardens, roadsides, cleaning of roads, systems involved in fire protection, washing of vehicles, toilet flushing, snow-making etc.
- Industrial uses: processes that involve water like cooling towers, washing, dust control etc.
- Environmental uses: It also helps in recharging the surface and ground water, marshes, wetlands, silviculture, wildlife habitat etc.
- Potable: Recharge aquifers ultimately leads to increase in quantity of drinking water.
Hence, having factories which recycle water helps in keeping the freshwater resources renewable.
The three main systems of government used today are unitary systems, federal systems, and confederate systems
