Ecotourism, when properly planned and managed, can have many benefits for both the environment and local communities. It can provide economic opportunities for local people, encourage the preservation of natural areas, and increase awareness and appreciation of the environment. However, ecotourism can also have negative impacts if it's not done responsibly.

Some of the potential negative impacts of ecotourism include:

1. Environmental damage: If not managed properly, ecotourism can cause damage to fragile ecosystems and wildlife habitats.

2. Overcrowding: Large numbers of tourists can cause overcrowding that can disrupt natural habitats and negatively impact wildlife.

3. Cultural disruption: Ecotourism can also disrupt local communities and cultures if not done in a way that respects local traditions and customs.

4. Resource use: Ecotourism can put a strain on natural resources such as water and energy, and can contribute to pollution and waste if not managed properly.

So, whether ecotourism is good or bad depends on how it is carried out. If it's done responsibly, with respect for the environment and local communities, it can have many positive impacts. However, if it's done without proper planning and management, it can have negative consequences.