After showing the graffiti-scarred city how to keep its walls clean at poll time, Salt Lake seems to be leading the clean-fuel move with around 50 per cent of its two-stroke auto fleet going visibly green.

Biofuels are a promising source of energy with major implications for global competitiveness, energy security and uncertain social and environmental impacts. Therefore, crafting policy and regulatory frameworks for biofuels nationally and internationally is likely to require intense debate, negotiations and compromise.

The United States and Canada want ships to burn cleaner fuel when approaching the continent to reduce smog-related deaths.

Attock Refinery Ltd (ARL) will start erecting a new 12,400 barrels per day (bpd) diesel hydrotreater and an isomerization unit at its refinery before end-June to produce cleaner autofuels, an industry source said on Wednesday.