Once again, road transport is the main culprit since it alone accounts for 84% of the carbon dioxide emissions attributable to transport.
再次强调，公路运输是罪魁祸首，因为仅公路运输就占了运输产生的二氧化碳排放量的84%。
2
Radon in our homes is the main source of exposure to ionizing radiation, and accounts for 50% of the public's exposure to naturally-occurring sources of radiation in many countries.
我们家中的氡是接触致电离辐射的主要来源，在许多国家中占大众接触自然发生的辐射源的50%。
3
Given these conflicting aims, it is not surprising that the food crisis has produced contradictory accounts of the main problem and radically different proposals for solving it.