Humans as a species are capable of radically altering earth's ecosystem. one goal of the environmental movement is to maintain a long-term relationship with the natural world. three themes that provide direction to this goal are:

reducing gases of the greenhouse, reducing plastic products, reuse renewable energies.

Explanation:

Nowadays we have plenty of problems because of the greenhouse gases, the main effect is the big hole of ozone in Earth atmosphere, the main effect of this hole is that the temperature is increasing, so the oceans temperature increases some species will dye.

Plastic products since they have a very long term life in Earth is very difficult to our planet to biodegrade, so the accumulation in soil and water we can see the effects in the big islands of treasure that is formed in oceans, and how the aquatic animals are eating them instead of food.

Renewable energies are other example of how we can use other sources of energy instead of petroleum products, in this way we avoid air pollution because of the fossil fuels burning.

oxygen +1 most likely

satellites are frequently used to make observations of the orbit on earth