Introduction:
Nani Palkhivala refers to the Earth as an ailing planet because he believes that our planet is facing numerous environmental issues and is in a state of crisis. In his essay, "The Ailing Planet: The Green Movement's Role," he highlights the detrimental impact of human activities on the environment and emphasizes the urgent need for environmental conservation.

Reasons for Calling Earth an Ailing Planet:
1. Environmental Degradation: Palkhivala argues that the Earth is ailing due to the rapid degradation of its natural resources. Human activities such as deforestation, pollution, and overexploitation of natural resources have led to an imbalance in ecosystems, causing irreversible damage to the planet.

2. Loss of Biodiversity: The rampant destruction of habitats has resulted in the loss of numerous plant and animal species. Palkhivala highlights the importance of biodiversity for maintaining a healthy planet and asserts that the current rate of species extinction is alarming.

3. Climate Change: Palkhivala acknowledges that the Earth is experiencing significant changes in its climate patterns, primarily due to human-induced greenhouse gas emissions. He states that rising global temperatures, melting glaciers, and extreme weather events are clear indications of the ailing state of our planet.

4. Pollution: Palkhivala emphasizes the detrimental effects of pollution on the Earth's ecosystems and human health. He discusses the pollution of air, water, and soil caused by industrial activities, waste disposal, and the use of harmful chemicals. These pollutants not only harm the environment but also pose risks to human well-being.

5. Resource Depletion: The continuous extraction and consumption of natural resources without considering their finite nature have led to resource depletion. Palkhivala argues that if we continue exploiting resources at the current rate, we will leave future generations with a depleted and compromised planet.

The Green Movement's Role:
Palkhivala believes that the Green Movement, which advocates for environmental conservation and sustainability, plays a crucial role in addressing the challenges faced by the ailing planet. He emphasizes the need for individuals, governments, and organizations to actively participate in the movement to bring about positive change.

Palkhivala suggests that the Green Movement should focus on promoting sustainable development, implementing policies to reduce pollution, conserving natural resources, and raising awareness about environmental issues. He also calls for international cooperation to tackle global environmental problems collectively.

Conclusion:
In conclusion, Nani Palkhivala calls the Earth an ailing planet due to the environmental degradation, loss of biodiversity, climate change, pollution, and resource depletion caused by human activities. He highlights the importance of the Green Movement in addressing these challenges and emphasizes the need for collective action to ensure a sustainable future for our planet.