id	keyword
hassl-3927	energy
hassl-3927	development
hassl-3927	emissions
hassl-3927	co2
hassl-3927	growth
hassl-3927	pollution
hassl-3927	countries
hassl-3927	south
hassl-3927	carbon
hassl-3927	co2 emissions
hassl-3927	impact
hassl-3927	asian
hassl-3927	population