Environmental scientists are using GPS ( It is effective but expensive) aerial monitoring (Quick but not the easiest), RFID tags, (mostly for long-term monitoring) and hidden cameras are used to study polar bear behavior without interruption to their environment.
Some ways would be to use less gas-powered items, such as some stoves. Communities can encourage carpools and walking. If you were to drive, don't gun the gas and drive at moderate speeds.
In your own home you can conserve energy by turning off lights and electronic devices when not in use. You could also use energy efficient light-bulbs.
Answer:
the process of DNA replication is called semi conservative because it results in two DNAs having a new strand and a old strand which is from the original DNA molecule
I think the answer in this is c because it shows how the scientist worked in feilds
All I can think of is glucose