Our Goal: #elephants

1. #elephant = (elephant to human ratio) * (total human population)
   • = 1 truck per 10,000 person (assumption) * 7B people
   • = 7,000,000,000/10,000 elephants in total
   • =70,000 elephants
2. Life-span of elephants is approximately 70 years (in a poaching free forest)
3. #elephants / lifespan
   • = 70,000/70y = 1000/y (this is the #elephants dying every year)
   • looks reasonable
4. If you estimate how many elephants are born every year
   • say we have a positive trend in elephant birth due to WWF's effort
   • Approximately 5% per year, so 5% of the total amount will increase
   • = 1000*5% = 50
   • 1050 elephants take birth every year.
5. The answer would be: there are 70,000 elephants in the world today and about 1050 take birth every year