Add spaces: ButtheMAINfactorgoverningvariationsbetweenpeopleisgeneEXPRESSION.

Answer: But the MAIN factor governing variations between people is gene EXPRESSION.

Add spaces: Itisworthwhiletolookattheimpactonsomeofthesmallereconomies.

Answer: It is worthwhile to look at the impact on some of the smaller economies.

Add spaces: Itwasagooddayforthestudents,theparentsandnotleastushereatSamsEnergyAcademy.

Answer:
It was a good day for the students, the parents and not least us here at Sams Energy Academy.