Determining Central Ideas in Community Activism

Read the following passage:

In the wake of rapid industrialization, many cities faced unprecedented challenges. Pollution blanketed the skies, transforming vibrant landscapes into hazy shadows of their former selves. Amidst this turmoil, community activists began to emerge, championing the cause of environmental preservation. These individuals rallied citizens to participate in tree-planting initiatives and clean-up drives, fostering a collective sense of responsibility. Their efforts not only aimed to restore the environment but also sought to evoke a deeper appreciation of nature within urban settings. As parks and green spaces gradually reappeared, the inhabitants of these cities rediscovered the beauty of the world beyond their concrete confines.