There is no such thing as bird years, so your budgie is still 4 years old :)
Answer:
global warming is the planet slowly warming up because of human influence and carbon dioxide, chlorofluorocarbons, along with other pollutants..so we could stop using so many chemicals and burning etc
During photosynthesis, chlorophyll absorb light energy that is used to convert carbon dioxide from the air and water from the soil into glucose. Oxygen is released as a by-product. Some glucose is used for respiration, while some is converted into insoluble starch.
Answer:
Identical twins have the same genetic material, but as you can see, every egg they both make is different. Every sperm a male makes is different.
