To use the concept of critical loads as a guideline where science has provided the necessary information to formulate and implement adequate national and international abatement and conservation strategies. I ••• A/CONF.151/PC/10 English Page 16 To agree on regional timetables by 1992 for phasing out those uses of hazardous substances which cannot be adequately controlled and to encourage the safe and appropriate use and disposal of hazardous substances based on a full assessment of risks to human health and the environment. To strengthen co-operation on the prevention, control and mutual assistance to deal with the transboundary impacts of industrial accidents such as the accident at Chernobyl nuclear power station. To phase out disposal of wastes at sea as soon as possible in accordance with the provisions of the London Dumping Convention , unless the disposal po5e5 no threat to the marine environment. To limit or reduce C02 emissions and other greenhouse gas emissions as much as possible and in the view of most ECE countries to stabilize them, by the year 2000 and at present levels as a first step and to commit themselves to establish national strategies and/or targets and schedules following the report of the IPCC and no later than the start of the negotiations of a framework convention on climate change. -~o strengthen international action to protect the ozone layer, including, for example, through additional resources and technology transfer, and to call on those ECE members who have not already done so to ratify or accede to the Montreal Protocol and on the meeting of the Parties to the Montreal Protocol in London in June 1990, recognizing that it will be necessary to contribute to the fulfilment of the financial and other conditions to be agreed by the Parties to encourage a broader participation in the Protocol, 
**Analysis**
The text appears to focus on international cooperation and agreements to mitigate the negative impacts of human activities on the environment, specifically in the areas of pollution, climate change, and ozone depletion. It mentions the need to phase out hazardous substances, reduce greenhouse gas emissions, and protect the ozone layer, indicating a strong emphasis on environmental protection.

**Category**
Natural resources and environment, International trade