I am not sure what the audience is expecting. A large part of the talk is about GHGs in general, and not about the animals. In fact, there is really nothing about the genetics underlying methane emissions in animals - it is about genetic selection and possible mechanisms, but not much about the links (genes) between them. 

A presentation about GHG mitigtion tools should also describe the other potential mitigation tools (vaccine, inhibitors, low GHG feeds for methane, inhibitors for N2O), and not lead to the impression that this is the only potential solution. This is an important point - this audience will go away with the impression that this is the only thing being done to mitigate agricultural GHGs.

The slides are a bit messy and inconsistent. They should be much more uniform in the use of fonts, etc. Some of things I picked up on my read through:

Slide 1. Address should be under the presenter's name, not above it.

Slide 6: Need a space between 1 and kg (always have space between number and its units).

Slide 7: Words go off edge of slide.

Slides 7 and 8 (and subsequent slides): Different fonts are used for the piechart headings.

Slide 11: Needs a full stop after et al., because al. is an abbreviation.

Slide 21: Picture covers the heading.

Slide 22: No capital V on Vol. This and sign should also have full stops to indicate abbreviations. Without a key, *, **, *** have little meaning.

Slide 24: Use cents symbol, not c.

Overall the sldes need to be more carefully editted.