Read the text and decide which word best fits the gap.

The environment is a topic that many people ... to improve. They ... cleaner air, water, and land to create a sanctuary for themselves and future generations. However, others ... the changes that may be necessary to achieve this, worried about the ... devices they may need to use, or the habits they may need to stick to.
Making ... changes to the environment can be a ... endeavor that requires thorough analysis and management. Many people may feel insignificant in their ability to affect change, but even small efforts can provide a confidence boost and a better ... on the environment.
The depletion of natural resources is a major environmental concern that can ... with conservation efforts. By working together, we can create a brighter future for all.