Scientists give two major reasons why plants become endangered: (1) large - scale destruction of wild countryside by development, logging, and agriculture and (2) invasions by nonnative plants that run amok and crowd out native species.
उसमें वो स्वास्थ्य कर्मचारियों और टीचरों को सलाह देती हैं कि दुर्व्यवहार के लक्षणों के प्रति जागरूक रहें ।