In 2010, approximately 4.6×107

To find out how many more tons of paper were recycled than plastic in 2010, we can start by converting the amounts into the same format:

- Tons of paper recycled: \(4.6 \times 10^7\)
- Tons of plastic recycled: \(2,600,000\) which can be expressed in scientific notation as \(2.6 \times 10^6\).

Now we can perform the subtraction:

1. Convert \(2.6 \times 10^6\) to have the same exponent as \(4.6 \times 10^7\):
- \(2.6 \times 10^6 = 0.26 \times 10^7\)

2. Now subtract:
- \(4.6 \times 10^7 - 0.26 \times 10^7 = (4.6 - 0.26) \times 10^7\)
- \(4.6 - 0.26 = 4.34\)

So, the difference is:
\[
4.34 \times 10^7
\]

The answer is **4.34×10^7** (option 3).