<p>&lsquo;Unconventional&rsquo; fossil fuels cover an extensive range of resource types (heavy oil and oil sands, shale/tight hydrocarbons, gas hydrates), some commercially competitive today, others a long way from viability.</p>

<p>The resource base is huge and will be a large contributor to production up to 2050. How will unconventional fossil fuels develop worldwide? Will environmental policies block their adoption?</p>
