Until a unesco inventory in 2008 , nobody knew even how many transboundary aquifers existed .
在2008年联合国教科文组织公布详细目录之前，甚至没人知道美国有多少跨境含水层。
On legal regime of the transboundary movements of hazardous wastes .
危险废物越境转移法律制度研究。
The group 's environment ministers had just met to discuss their 2002 agreement on " transboundary haze pollution " and note that their efforts had helped reduce haze .
The united states and finland , the largest donor to the mrc , are among nations urging laos to wait for more scientific data on the likely transboundary impacts .
Recent workshops have included the discussion of appropriate environmental education , innovative water recycling uses , and transboundary resources sharing .
