Parts Covered for 8 years or 80,000 milesIf your vehicle has one of the following parts, thisFederal Emission Warranty covers that part for aperiod of 8 years or 80,000 miles, whichever occursfirst.These limits are counted from the time when yourBasic Warranty begins under 2.1(D).
Since, the upper leaf blade is directly faced to the sun, the rate of transpiration increases. Hence, to prevent excessive transpiration, stomata are more in lower surface i.e. relatively less transpiration happens from the lower epidermis. Plants also remove water in the form of (liquid), this is guttation.
The epidermis is NOT photosynthetic, with the exception of the two guard cells that surround each stoma. The upper epidermis typically has only about half the density of stomata that occur on the lower epidermis, so while transpiration does occur across the upper epidermis, not as much occurs as across the lower.