KNOWLEDGE ALIENS HAVE SHARED THAT 'THEY' ARE KEEPING FROM US ACCORDING TO MY GRANDFATHER

'They' are the Illuminati as far as I can make out
  1. How to eliminate our reliance on oil and implement renewable energy.
  2. How to eliminate world hunger/poverty.
  3. How to eliminate disease in general, particularly cancer & the common cold.
  4. How to apparate.
    /teleport? but literally the word he used is apparate.