He also says it's essential from an environmental point of view to change the way we deal with food waste.
On the other hand, scientists themselves need help extracting the essential from the vast amount of information that is available.
A "brand identity" is essential – from Gareth Bale's love heart hand gesture (copyright) to Mo Farah's Mobot.
Sifting essential from inessential facts is the great problem of modern biographies, which have bulked up on the steroids of more-than-ample documentation and authorial insecurity.
The danger now is that such a vast accumulation of records makes it nearly impossible to distinguish the essential from the ephemeral.
The votes she swung behind the Lib Dem Sarah Olney were vital, but less important than the message that anti-tribal alliances will be essential from now on.
We are unlikely to get the sustainable social care solution that carries consensus, which everyone has said is essential, from this government.
Kevin Kibble, chief executive of the Caspari Foundation, agrees that impact measurement is now essential from a fundraising point of view.
It was essential, from the druids' point of view, that the berries did not touch the floor or their fertility powers would be lost.
Emily Graves, consultant haematologist, Sunderland Everybody is essential, from the admin staff to the occupational therapists and other lesser known allied health professionals, and sometimes it can be easy to under-appreciate a team member's contribution.
And with this story, it has been essential: from its reporters on Twitter the night of the manhunt to the epic narrative it ran last Friday, with five bylines and the names of twenty-two othereportersreporters
